package com.example.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.conditions.update.UpdateWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.example.reggie.dto.DishDto;
import com.example.reggie.entity.Dish;
import com.example.reggie.entity.DishFlavor;
import com.example.reggie.mapper.DishMapper;
import com.example.reggie.service.DishFlavorService;
import com.example.reggie.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
import java.util.stream.Collectors;

@Service
@Slf4j
public class DishServiceImpl extends ServiceImpl<DishMapper, Dish> implements DishService {

    @Autowired
    private DishFlavorService dishFlavorService;


    /**
     * 新增菜品并保存口味数据
     * @param dishDto
     */
    @Transactional
    public void saveWithFlavor(DishDto dishDto){
        //保存菜品的基本信息到菜品表dish
        this.save(dishDto);

        Long dishId = dishDto.getId();

        List<DishFlavor> flavors = dishDto.getFlavors();
        flavors = flavors.stream().map((item) -> {
            item.setDishId(dishId);
            return item;
        }).collect(Collectors.toList());

        //保存菜品口味到dish_flavor表
        dishFlavorService.saveBatch(flavors);
    }

    /**
     * 根据id查询菜品和对应的口味
     * @param id
     * @return
     */
    public DishDto getByIdWithFlavor(Long id){
        //从dish表查询菜品基本信息
        Dish dish = this.getById(id);

        DishDto dishDto = new DishDto();
        BeanUtils.copyProperties(dish,dishDto);

        //从dish_filavor表查询当前菜品对应的口味信息
        LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(DishFlavor::getDishId,dish.getId());
        List<DishFlavor> flavors = dishFlavorService.list(queryWrapper);
        dishDto.setFlavors(flavors);

        return dishDto;
    }

    /**
     * 根据id修改菜品和对应口味
     * @param dishDto
     */
    @Override
    @Transactional
    public void updateWithFlavor(DishDto dishDto){
        //更新dish表
        this.updateById(dishDto);

        //清理当前菜品对应口味数据：dish_flavor表delete操作
        LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(DishFlavor::getDishId,dishDto.getId());

        dishFlavorService.remove(queryWrapper);

        //添加当前提交过来的口味数据：dish_flavor表insert操作
        List<DishFlavor> flavors = dishDto.getFlavors();

        flavors = flavors.stream().map((item) -> {
            item.setDishId(dishDto.getId());
            return item;
        }).collect(Collectors.toList());

        dishFlavorService.saveBatch(flavors);
    }

    /**
     * 修改菜品售卖状态
     * @param status
     * @param ids
     */
    @Transactional
    public void updateStatus(int status,Long[] ids) {
//        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
//        queryWrapper.in(Dish::getId,ids);
//        List<Dish> list = dishService.list(queryWrapper);
//        list = list.stream().map((item) ->{
//            item.setStatus(status);
//            return item;
//        }).collect(Collectors.toList());
//        dishService.updateBatchById(list);

        UpdateWrapper<Dish> updateWrapper = new UpdateWrapper<>();
        updateWrapper.set("status", status).in("id", ids); // update dish set status={} where id = {};
        this.update(updateWrapper);
    }
}
